/*
 * StarTrack Elegant Loader
 * Minimalist cyberpunk aesthetic with refined animations
 */

:root {
    --loader-cyan: #00f0ff;
    --loader-yellow: #fcee0a;
    --loader-green: #05ffa1;
}

/* ========== 主容器 ========== */
.startrack-loader,
.startrack-screensaver {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #030508 0%, #0a1018 50%, #050810 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    opacity: 1;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

/* Canvas layers for energy effects */
.loader-electric,
.loader-lightning {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.6;
    mix-blend-mode: screen;
}

.loader-lightning {
    opacity: 0.9;
}

.loader-lightning path {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.4));
}

.loader-lightning path.lightning-glow {
    stroke-width: 6;
    opacity: 0.65;
    filter: blur(5px);
}

.loader-lightning path.lightning-core {
    stroke-width: 2.2;
    opacity: 0.95;
}

.startrack-loader.loader-hidden,
.startrack-screensaver.loader-hidden {
    opacity: 0;
    pointer-events: none;
}

/* ========== 背景星空 ========== */
.loader-stars {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.loader-star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #fff;
    border-radius: 50%;
    opacity: 0;
    animation: starTwinkle 3s ease-in-out infinite;
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.4);
}

@keyframes starTwinkle {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.2); }
}

/* ========== 核心内容 ========== */
.loader-core {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
}

/* ========== 轨道系统 ========== */
.loader-orbit-system {
    position: relative;
    width: 240px;
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 轨道环 */
.loader-orbit {
    position: absolute;
    border-radius: 50%;
    border: 1px solid;
    opacity: 0.6;
}

.loader-orbit-1 {
    width: 240px;
    height: 240px;
    border-color: rgba(0, 240, 255, 0.25);
    animation: orbitSpin 20s linear infinite;
}

.loader-orbit-2 {
    width: 180px;
    height: 180px;
    border-color: rgba(252, 238, 10, 0.2);
    animation: orbitSpin 15s linear infinite reverse;
}

.loader-orbit-3 {
    width: 120px;
    height: 120px;
    border-color: rgba(5, 255, 161, 0.15);
    animation: orbitSpin 10s linear infinite;
}

@keyframes orbitSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 轨道上的光点 */
.loader-satellite {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: satellitePulse 2s ease-in-out infinite;
}

.loader-satellite-1 {
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--loader-cyan);
    box-shadow: 0 0 15px var(--loader-cyan), 0 0 30px var(--loader-cyan);
}

.loader-satellite-2 {
    top: 50%;
    right: -4px;
    transform: translateY(-50%);
    background: var(--loader-yellow);
    box-shadow: 0 0 15px var(--loader-yellow), 0 0 30px var(--loader-yellow);
    animation-delay: 0.5s;
}

.loader-satellite-3 {
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--loader-green);
    box-shadow: 0 0 15px var(--loader-green), 0 0 30px var(--loader-green);
    animation-delay: 1s;
}

@keyframes satellitePulse {
    0%, 100% { 
        opacity: 0.6;
        transform: translateX(-50%) scale(0.9);
    }
    50% { 
        opacity: 1;
        transform: translateX(-50%) scale(1.2);
    }
}

.loader-satellite-2 {
    animation-name: satellitePulse2;
}

@keyframes satellitePulse2 {
    0%, 100% { 
        opacity: 0.6;
        transform: translateY(-50%) scale(0.9);
    }
    50% { 
        opacity: 1;
        transform: translateY(-50%) scale(1.2);
    }
}

/* 中心核心 */
.loader-nucleus {
    position: absolute;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, 
        rgba(0, 240, 255, 0.15) 0%, 
        rgba(5, 8, 16, 0.95) 70%);
    border: 1px solid rgba(0, 240, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 0 40px rgba(0, 240, 255, 0.15),
        inset 0 0 20px rgba(0, 0, 0, 0.8);
}

.loader-percentage {
    font-family: 'Orbitron', monospace;
    font-size: 1.1em;
    font-weight: 700;
    color: var(--loader-cyan);
    text-shadow: 0 0 20px var(--loader-cyan);
    letter-spacing: 1px;
}

/* ========== 品牌区域 ========== */
.loader-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.loader-title {
    font-family: 'Orbitron', monospace;
    font-size: 2.4em;
    font-weight: 900;
    letter-spacing: 16px;
    color: var(--loader-yellow);
    text-shadow: 0 0 40px rgba(252, 238, 10, 0.6);
    animation: titleBreath 4s ease-in-out infinite;
}

@keyframes titleBreath {
    0%, 100% { 
        opacity: 0.9;
        text-shadow: 0 0 40px rgba(252, 238, 10, 0.6);
    }
    50% { 
        opacity: 1;
        text-shadow: 0 0 60px rgba(252, 238, 10, 0.8);
    }
}

.loader-subtitle {
    font-family: 'Rajdhani', monospace;
    font-size: 0.85em;
    letter-spacing: 5px;
    color: rgba(160, 174, 192, 0.7);
    text-transform: uppercase;
}

.loader-status {
    font-family: 'Orbitron', monospace;
    font-size: 0.75em;
    letter-spacing: 3px;
    color: var(--loader-cyan);
    text-transform: uppercase;
    opacity: 0.8;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* ========== 待机模式按钮 ========== */
.screensaver-enter-btn {
    margin-top: 40px;
    padding: 16px 48px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(252, 238, 10, 0.1));
    border: 2px solid var(--loader-cyan);
    color: var(--loader-cyan);
    font-family: 'Orbitron', monospace;
    font-size: 1em;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.screensaver-enter-btn::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(0, 240, 255, 0.3), transparent);
    transform: rotate(45deg);
    animation: btnShine 3s linear infinite;
}

@keyframes btnShine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.screensaver-enter-btn:hover {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(252, 238, 10, 0.2));
    border-color: var(--loader-yellow);
    color: var(--loader-yellow);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.4), 0 0 60px rgba(252, 238, 10, 0.3);
    transform: scale(1.05);
}

.screensaver-enter-btn:active {
    transform: scale(0.98);
}

.screensaver-enter-btn .btn-icon {
    margin-left: 12px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.screensaver-enter-btn:hover .btn-icon {
    transform: translateX(5px);
}

.screensaver-status {
    color: var(--loader-purple);
    opacity: 0.7;
}

/* ========== 进度条 ========== */
.loader-progress-container {
    width: 320px;
    height: 3px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 10px;
}

.loader-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, 
        var(--loader-cyan) 0%, 
        var(--loader-yellow) 50%, 
        var(--loader-green) 100%);
    border-radius: 2px;
    transition: width 0.3s ease-out;
    box-shadow: 0 0 10px var(--loader-cyan);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .loader-orbit-system {
        width: 200px;
        height: 200px;
    }
    
    .loader-orbit-1 { width: 200px; height: 200px; }
    .loader-orbit-2 { width: 150px; height: 150px; }
    .loader-orbit-3 { width: 100px; height: 100px; }
    
    .loader-nucleus {
        width: 60px;
        height: 60px;
    }
    
    .loader-title {
        font-size: 1.8em;
        letter-spacing: 10px;
    }
    
    .loader-progress-container {
        width: 260px;
    }
}

@media (max-width: 480px) {
    .loader-orbit-system {
        width: 160px;
        height: 160px;
    }
    
    .loader-orbit-1 { width: 160px; height: 160px; }
    .loader-orbit-2 { width: 120px; height: 120px; }
    .loader-orbit-3 { width: 80px; height: 80px; }
    
    .loader-nucleus {
        width: 50px;
        height: 50px;
    }
    
    .loader-percentage {
        font-size: 0.9em;
    }
    
    .loader-title {
        font-size: 1.4em;
        letter-spacing: 8px;
    }
    
    .loader-subtitle {
        font-size: 0.7em;
        letter-spacing: 3px;
    }
    
    .loader-progress-container {
        width: 200px;
    }
}